Radiator tube



S. W. MACBETH RADIATOR TUBE Filed July 5, 1921 In vntar.

Patented Jan. 1925.

SYDNEY WATT MACBETH, OF ST.

' p 1,523,028 rare-a o- F.- ea.

cameraman-s. oN'rAaIo, CANADA.

RADIATOR TUBE:

Application filed July 5,-:192-1'. -Serial No. 482,520.

To all whom it'mag/ concern:

Be-it known that LSYDNEY WATT Mao-- BETH, a subject "of the King of Great- Britain, and:=-resident ;ofthe a city of Catharines, county of Lincoln, Province of Ontario, in the Dominion of: Canada, have invented certain new and useful Improvements in Radiator Tubes, described in the following specification and illustrated in the accompanying drawings, that form part of the same.

The principal objects of this invention are to increase the radiating efliciency of cooling radiators to render the construction stronger and more durable and to materially reduce the cost of production.

The principal feature of the invention consists in the novel Construction of the paired corrugated sheets of metal having the end edges shaped to co-ordinate and to secure the whole mass together, and presenting vertical columns for the cooling of the water.

In the drawings, Figure 1 is a front elevational view on an enlarged scale of a portion of a radiator constructed in accordance with this invention.

Figure 2 is a vertical cross section through the central portion of the radiator.

Figure 3 is an enlarged perspective detail of a portion of the radiator core.

In the production of radiators for motor cars it has been the custom to carry the water through a plurality of tubular structures which are constructed of very narrow dimensions, the actual volume of the water passing through each tube being very small and the tubes are bent into peculiar shapes. Such constructions have been highly objectionable because they form pockets in which sediment and impurities fromthe water and from the corrosion of metal parts may lodge and with the peculiar contour of these tubular passages it is practically impossible to cleanse them.

It is the purpose of this invention to eliminate these conditions and provide a radiator which may be readily cleansed and which will be tolerably free from the conditions of choking.

In the illustration herein shown, a plurality of tubes A are formed by placing together two sheets 1 and 2 of corrugated metal'each having corrugations 3-which are arranged spaced apart so as to afford a free with the small corrugations of the central portion, but they are corrugated with a long and extremely coarser web 5. The width of each corrugation extends beyond the outer surfaces of the smaller corrugations. This is clearly shown in the illustration in Figure 1 which shows the long, serpentine, double lines first curving beyond the outer side of the corrugated vertical tube at the right and then curving beyond the left side and so on, back and forth.

Each of the plates is pressed so that these long corrugations will match or internest and in order to form one tube the plates are placed together. The long corrugations fit in together while the shorter corrugations are spaced apart. hen thus placed togethcr the two plates are secured by soldering the meeting edges of the long corrugated outer surface and the intermediate portions form a straight tube, the central portion of which extends directly through while the sides are corrugated and spaced apart.

These corrugated surfaces present obstructing walls to the flow of the water, holding it back from too fast a circulation so that it receives the full benefit of the air flowing between the vertical columns or tubes.

The vertical columns are spaced apart by the end corrugations and the air striking the front of the radiator is directed into the spaces 6 between the said vertical tubes.

It will be readily apparent that a radiator constructed as described has no joints that are not readily accessible from the outside as the only joint in the metal is the meeting edges of the web portions 5 and these are soldered together at their extreme outer the tubes will permit of the insertion of a wire or other instrument from one end to the other.

What I claim as my invention is 1. A radiator, comprising, tubes each formed of a pair of sheet metal strips corrugated transversely and spaced apart the longitudinal edges of each pair being joined together and formed into corrugations of greater depth than the maximum Width of the tube formed by the paired sheets, the end corrugations of each tube meeting the end corrugations of the adjacent tube and spacing the tubes apart from end to end.

2. In a radiator, a plurality of tubes formed of metal sheets arranged in pairs and each having transverse corrugations extending partly thereacross, the end edges of each pair being sealed together to form the tubes and said sealed edges being corrugated so that the corrugations are of greater depth than the transverse ividth of thetube, said tubes being placed together with the corrugations of'the sealed end strips engaging and spacing the tubes apart throughout their entire length so that the space between the tubes is entirely free for the passage of air and the surface exposed to the air is equal to the inner surface of the tubes exposed to the Water.

SYDNEY WATT 'MACBETHJ 

